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[R4R] add ics23 proof support for cross chain packages
Description
This is a hard fork and will add ics23 proof support for cross chain packages.
Rationale
Supporting ics23 proof shares the same security level as CosmosHub by upgrading the old IAVL lib to the latest ICS23 implementation.
Changes
Notable changes:
- brings a a hard fork
Bohr
- adds ics2 proof support for cross chain packages.